Elevating-machine



(No Model.) I 2 Sheets-Sheet I. J. E. BYRNE.

ELEVATING MAGHINE. No. 404,893. Patented June 11, 1889.

(No Model.) 2 SheetsS heet 2.

J. E. BYRNE.

' BLEVATING MACHINE.

No. 404,893. Patented June 11, 1889.

UNITED STATES PATENT OEEIcE.

JAMES EDVIN BYRNE, OF BROOKLYN, NEXV YORK.

ELEVATlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 404,893, dated June 11,1889.

Application filed August 10, 1888. Serial No. 282-477. (No model.)

To all whom, it may concern.-

Be it known that I, J AMES EDWIN BYRNE, a'citizen of the United States,and a resident of Brooklyn, in the county of Kings and State of NewYork, have invented certain new and useful Electric Elevating-Machines,of which the following is a specification. Y

My invention relates to improvements in elevating machinery in which arotating drum operates in connection with cables, which, being attachedto a suitable car, gives it upward or downward motion, automatic top andbottom and intermediate safety-stops operating in conjunction therewith;and the objects of my improvement are, first, to substitute electricmotive power for those now in use; second, to substitute in place of thepresent safety mechanical arrangements on the machine for automaticallyreversing the motion of the elevator-car at the top or bottom of thehoistway, or at an intermediate point if the car should meet anobstructionin its descent, thereby causing the car to stop in thehoistway and the hoisting-cables to unwind from the drum, and commonlyknown, respectively, as automatic top and bottom stops and automaticintermediate step, automatic stops that operate in connection withelectric circuits; third, to provide a form of machine that can beoperated in a simple manner by means of electric circuits and a switchin the car; fourth, to substitute for the mechanical arrangement foroperating the brake an electrical device which is operated from theswitch in the car; fifth, to provide a means of automatically reversingthe position of the switch at the top and bottom of the hoistway,thereby reversing the motion of the car and preventing accident, thusforming additional top and bottom automatic stops; and, sixth, tosubstitute for the present elevator-m achines with winding-drums onemore simple and efficient and especially adapted for passenger-service.I attain these objects by mechanism illustrated in the accompanyingdrawings, in which- Figure 1 is a side elevation of the machine withhoisting-cables wound on and leading up from. winding-chum. Fig. 2 is anend elevation of the machine with hoisting-cables wound on and leadingup from wimling-drum.

, winding-drum in connection with a side elevation of the top of theelevator-shaft with part-s broken away, and the elevator-car with partsbroken away, showing the switch in connection with automatic mechanismfor reversing it. This figure also shows a diagram of theelectric-circuit connections between the carswitch, the automatics, andthe electric motors, together with their make and break contacts. Fig. 4is a side elevation of the bottom of the elevator-shaft with partsbroken away, showing the car with parts broken away, and the switch inconnection with antomatic mechanism for reversing it. Fig. 5 is anenlarged view, in side elevation, of the brake and mechanism withelectric motor for operating the same, the rest of the machine beingbroken away. Fig. 0 is an enlarged view, in plan, of the brake andmechanism, with electric motor for operating the same, the rest of themachine being broken away. Fig. 7 is a side elevation of theintermediate stop mechanism and the winding-drum and machine-base, thetwo latter being with parts broken away.

Similar figures and letters refer to similar parts throughout theseveral views.

The base 10 and the standards 20,21, 4.), and 50 form the bed of themachine. The electric hoisting-motor 1 and the backingmgto jj beingsecured to the worm-shaft 2, give motion in either direction directly tothe worm-shaft 2, which has fastened on itthe worm 3, meshing into theworm-wheel 4, which is fastened to the drum-shaft 5, with bearings 25and 26, in standards 20 and 21., which drumshaft has fastened to it thehoisting-drum 6 and causes the hoisting-drum 6 to revolve, therebywinding the hoisting-cables 7 and hoisting the elevator car 8. Theelectric brakemotor 9, giving motion directly to the brake-worm shaft10, which has fastened on it the brake-worm 11, meshing into theswinging worm-segment 12, which is pivoted at point 13, and has attachedto it at points 14 and 15 the brake-strap 16, causes the brakestrap 10to grip the brake-wheel 17, whereupon the brake-wheel 17, being attachedto the hoisting-worm shaft 2, stops the motion of the said hoisting-wormshatt when the electric hoisting-motorl is not in operation. The spring18, being attaehei'l to the machine-base l!) and to the swingingworm-segment 1?, draws back the segment 12 when the brakemotor 0 isnotin operation, thereby slaekenin the brake-strap ll 6. To the standardis attached the ribbedbracket 22, through the perforated arms 23 and. 2tof which passes the drum-shaft 2 to its bearing 25. On the portion ofthe drum-shaft 2 included between the arms 23 and 24: cut a screw-thread30, and along which travels a nut 27, carrying insulated arms 28 and.29, the travelingnut 27 being prevented lrom turning by means of afeathor '31 on the bracket 22 which slides through aslot 32,1et into thenut 27. ()n the bracketarms 23 and 24 are located the machine top andbottom automatic stop contact-points S3, 35, 55, and 56, so arranged andat such a distance apart that spring contact-point 33 will be struck bythe insulated arm 28, and thereby, in a manner to be hereinafterexplained, cause the elevator-car to be automatically reversed onlyafter the elevator-car has passed its upper landing, and thus preyentits wrecking itself in the top of the hoist-way, it from any cause itshould not be controlled in the usual manner by the car-operator, andcontact-point will be struck by the insulated arm 29, and thereby, in amanner to be hereinafter explained, alter the direction of motion. ofthe elevator-car, and thus prevent its wrecking itself in the bottom ofthe hoistway, it from any cause the operator should fail to stop it.

On the machine-base 1.) are located the intermediate automatic stopcontact-points 37 and $34, so arranged as to be struck by the end of thelever 39, which lever 39 is iulerumed at point it) and has arms 4'1 and42 extending" along the bottom of the drum (,5, and thereby, in a mannerto be hereinafter explained, cause the elevator-car to be reversed, andtherel'iy prevent accident when from any cause the down ward progress ofthe elevator-car is impcded by an obstruction while the machine is' inmotion, thereby cruising the cables 7 to unwind from the drum, theweight oi which, talling on the arms ll and -t-2,causes the lever Ill)to operate.

The operation of the machine is as Follows: The battery-wire c isconnected with the switch it; in the car, the hoistirig-machine motor l,wire (ois connected with the contact-point 4-4: in the car, thelowering-machinc motor 57, wire (I, is connected with the contact-point54- in the car, and the ln'ake-motor 9, wire I), is connected with thecar contact-point 415. Eleclectrical contact being made in the carbetween wires 0 and (L by means of the switch it} and contact-poinut-4t,the motor 1 is started and the machine is set in operation. to hoist thecar 3. ("on'iaet now being broken betwecii wires u and (by means of switch 4-3 and made between wires t) and c by means ol' switch t2}, themotor is tirst stopped, and then thebrakemotor tl being set in operationthe brake acts instantly to overcome any existing inertia of the machineaml ear. Contact now being broken between wires 7) and w by means ofswitch 43 and then made by means of switch 443 between wires c and d,the brake is first slackened by action of spring 18, and then motor 57starts, reversing the motion of the worm-shaft; and. lowering the car 9.\Vcllknown forms of motors, with suitable tangential brushes that willadmit of this reversal of the direction of motion 01'' worm-shat't 2,are to be used.

For the purpose of slunving the operation of the automatics, we will nowsuppose the car at the top landing and the brake on and breaking contactat contact-point to by means of the switch 43, thus throwing oil thebrake, and, making contact between switehwl i and contact-point 5 t,cause the ear to descend until an obstruction is accidentally met within the hoistway, thus preventing the car from descending any farther andcausing the ropes to unwind from the drum (5. The ropes, now falling bytheir own weighton the lever-arms t1 and i2, cause the lever 31) tooperate and break contact in circuit (Z at: ct'intaet-l'ioint 3i andinstantly make contact at contactpoint 37 between wires 0 and (t througha portion of the wire (1, thereby causing the machinemotor 1 to start,and thus prevent the ropes from unwinding farther, and at thesame timeby the agitation of the car attract the car-operators attention to thestate of at't'airs. The

obstruction being new removed, the car tit",

scends to the lower lai'iding, where the operator neglects to stop itand the car attempts to go farther. As the car travels on a shortdistance farther, the insulated arm 21') comes in contact: with thecontactpoint breaking the circuit (I and making connection between thewires (0 and. (3 through a portion ot the wire d and starting themachinc-motor l. The car-o] )erator now making connection between wiresor and c, by means ot' the car switch it) and the cinitact-point -l-|-,the car is started upward until, on reaching the top landing, theoperatorneglects to stop it. The insulated arm 28 on the machine, as thecar attempts to ascend l'arthcr,breaks the circuit (1/ at thespring-contact points 3323 and instantly makes contact between the wires1' and (I through a portion of the wire (I, and the jmotor 57 starts,causing the car to descend until the arm 2% moves away l'rom the springcontact-points $33, and thus allows the cireuitu to be again closed, thevibration of the car caused by the alternate making and breaking of thecircuit calling the attention of the operator.

As an additional set of autonnitic top and bottom stops, the switch i3is t'nlcrumed at point i8 and extends through the side ot. the car, soas to come in contact with the projection 't-ti,attz'whcd to one of thesides ot. the top of the hoistway, and when. the ear attempts to ascendbeyond the upper landing to shift it and cause the contact between thewires c and a at contact-point H to be lrrokcn and contact to be madebetween wires r and (I at contact-point 5%, thus reversing the motion ofthe car. In the same manner, when the ear attempts to go below thebottom landing the switch-arm strikes the projection 47, which causesthe switch to break contact between wires 0 and (1 at contact-point 54and make contact between wires to and c at contact-point 44c, and thusreverse the motion of the car.

I am aware that prior to my invention winding-drums driven by worm andgear band and brakes, electric motors with beltconnections, andmechanically operated top and bottom automatic stops have been made andapplied in connection with elevator-machinery, and that electric motorshave been used for driving-pumps for hydraulicelevators. I therefore donot claim either of these specifically.

W'hat I do claim as my invention, and desire to secure by LettersPatent, is-

1. The combination, in an elevating-machine, of a winding-drum and twoelectric motors, (one for hoisting and the other for lowering,)connected througha train of mechanism, consisting of a worm-shaft, aworm, a worm-wheel, and a drum-shaft, all substantially as set forth.

2. 'Ihe combination, in an elevating-machine, of a win ding-drum and twoelectric motors, (one for hoisting and the other for lowering,)connected through a train of mech;

anism, consisting of a worm-shaft, a worm, a

worm-wheel, and a drum-shaft, the motors being in electrical connectionwith contactpoints in the elevator-car,-all substantially as set forth.

3. The combination, in an elevating machine, of a band-brake having aslackeningspring and an electric motor, the band brake and the motorbeing mech anically connected through a worm-shaft, a worm, a worm-wheelsegment swinging about its shaft and fastened to the brake-baud at twopoints, the slackening-spring being attached to segment at some pointbelow its shaft and at some point without said segment, the motor beingin electrical connection with a contact-point in the elevator-car, allsubstantially as set forth.

4:. In an elevating-machine, the combination of a bracket having armscarrying electrical contact points, the said electrical contactpointscarried by the bracketrarms, a feather which prevents a travelingnutturning, a traveling nut carrying insulated arms which engage withthe electrical contact-points carried by said bracket-arm ,hoi sting andlowering in otors, contact-points in elevator-car, and abattory, theelectrical contact-points carried by said bracket-arms being in theelectrical circuit connecting the elevating-machine hoisting andlowering motors, the contact-points in elevator-car, and the-battery,all substantially as set forth.

5. In an elevating-machine, the combination of a rocking lever ha'vingarms at one end upon which the hoisting-ropes fall whexrthey unwind fromthe winding-drum, and at the other end an arm with an insulatedtip,hoisting and lowering motors, contact-points with which theinsulated tip on the end of the said rocking lever engages,contact-points in the elevator-car, and a battery, the contact-pointswith which the insulated tip on the end of the said rocking leverengages being in the electrical circuit connecting the hoisting andlowering motors, contact-points on the bracket-arms,contact-points inthe elevator-car, and

battery, all substantially as set forth.

(3. The combination of two electric motors fastened to the same shaft,one for hoisting and the other for lowering, and a drum winding thehoisting-cables of an elevator-car connected through a train ofmechanism, the motors being in electrical connection with acontact-point in the elevator-car,a brake operated by an auxiliaryelectric motor connected through a train of mechanism, the auxiliarymotor being in electrical connection with a contact-point in theelevator-car, a nut traveling on the windingdrum shaft and carryinginsulated arms which engage at the ends of the travel of the nut withcontact points mounted 011 the arms of a bracket which carries a featherfor preventing the said nut from turning, said contact-points being inthe electric circuit connecting the machine-motors with thecontact-points in the car, a rocking lever which makes and breakscontact between the battery-wire and the machine-motor wires, and aswitch connected with thebattery-wiie and extending through the side ofthe elevator-car and engaging with stops at the top and bottom of theele ator-hoistway, thereby altering the position of the switch in thecar, all substantially as set forth.

Signed at lirooklyinin the countyef Kings and State of New York, this6th day of August, A. D. 1888.

JAMES ED'WIN BYRNE.

Witnesses:

ROCKWELL J. HUNTER, CEPHAS LAcEv.

.TIO

